The part of the sentence "familiar with working with" is correct and usable in written English.
You can use it when you want to express that someone is knowledgeable and experienced in a particular type of work or skill. For example, "The candidate was highly qualified for the position, as he was familiar with working with cutting-edge technology."
All three exercise programs were directed by physical therapists who were already working in the homes and thus familiar with working with the study population.
In the first period, clinical guidelines were not yet nationally implemented, while GPs in the second period were already very familiar with working with guidelines.
If you're not familiar with working with metals and torches, don't try this.
Don't attempt to open a power supply unit to attempt repairs or experiment with the parts if you're not familiar with working with high voltage circuits.
Afterwards, they were monocularly trained in a VI20 schedule, in order to make them familiar with wearing and working with an eye cap.
It was an easy transition to switch over to restoration full time, he said, because building audio prototypes made him familiar with aluminum extrusions and working with wood.
Experimenters will be familiar with the difficulties of working with lipids because of solubility, stability and detergent problems, let alone complexities of endogenous metabolism once exogenous lipids come into contact with cells.
To be familiar to what you are working with.
General dentists were often not familiar with currently acceptable techniques for working with children who cry, scream, squirm or resist examination or treatment.
Politicians and their constituency offices are likely to be familiar with the potential challenges of working with civil society, including claims that particular groups represent relevant patients or the public.
This procedure should be done by two people who are familiar with the procedure and comfortable working with an iguana.
